A theoretical study on the optical properties of a quantum well with short-range bottomless exponential potential

Ungan F., Mora-Ramos M. E., Sakiroglu S., Sari H., Sokmen I.

INTERNATIONAL JOURNAL OF MODERN PHYSICS B, cilt.33, sa.20, 2019 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 33 Sayı: 20
  • Basım Tarihi: 2019
  • Doi Numarası: 10.1142/s0217979219502254
  • Dergi Adı: INTERNATIONAL JOURNAL OF MODERN PHYSICS B
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Anahtar Kelimeler: Short-range bottomless exponential potential quantum well, nonlinear optical response, intense laser field, electric and magnetic fields, INTENSE LASER FIELD, 3RD-HARMONIC GENERATION, ABSORPTION-COEFFICIENT, MAGNETIC-FIELD, INDEX CHANGE, DRIVEN, NOISE, DOTS
  • Dokuz Eylül Üniversitesi Adresli: Evet

Özet

The effects of external applied fields on the electron-related optical nonlinear properties in a short-range bottomless exponential potential quantum well are investigated. The potential profile behaves as inverse square root in the vicinity of the origin and vanishes exponentially toward infinity, supporting a finite number of bound states whose energies and wave functions are determined within the effective-mass approximation. The linear, third-order nonlinear and total optical absorption coefficients (TOACs) as well as the coefficient of relative refractive index changes (RRICs) of the system are calculated from the expressions derived in the framework of the compact density matrix approach. The results obtained after numerical calculations show that with the effect of the static electric and magnetic fields (high-frequency THz laser field), the resonant peak position of the optical response shifts toward higher (lower) energies and the magnitude of the peak increases.